Rad! Thanks! I thought about trying a hollow spar with a B fold... do you think that would help? Keep it the same size, but make it hollow?
Weight savings is never a bad thing, and a hollow box spar would probably be stronger than the stacked foam. Mostly the airfoil is just super thick at the spar. When I first made this, the long chord length at the wing root made it seem too thin with only a 1/2" thick (2 foam thickness) spar, so I added the 3rd foam piece. It works just seems too draggy. (I have a real mini drak as well, and the airfoil is quite a bit thinner than my version). Mine is more stretched ClarkY than MH30.
I also think a redesign of the motor mount to ditch the FT firewall and go to a more tapered/aerodynamic 3d print would help. I'm sure it has a station wagon like drag coefficient right now.
That being said, with the tail boom setup, this thing flys smooooooth. The speed is very reasonable as well. Getting some efficiency back so it could fly on 3s comfortably would probably be a good path, instead of just brute forcing through it with more thrust. That being said I did pick up a 1450kv motor specifically to get some more oomph out of the 8x6 prop.
It seemed happiest at 75% throttle, but comfortably flies a lot slower. I figured a little more prop RPM couldn't hurt.
I'm excited to see what you come up with and I think it will be awesome to see how far you can take and improve this design.
